Tourism to Antarctica is surging, in part because visitors fear the continent’s iconic ice and wildlife may not last as the planet warms. Scientists and conservationists warn that more boots on the ground—and more people on ships—heighten the risk of contaminating the fragile environment and introducing or spreading disease.
Although Antarctic tourism remains limited compared with other destinations—high cost and travel time restrict many travelers—visitor numbers are climbing rapidly. In 2024, the International Association of Antarctica Tour Operators reported that more than 80,000 people landed on the continent and another 36,000 observed from vessels. The International Union of Concerned Scientists says visitation has grown roughly tenfold over the past 30 years, and researchers at the University of Tasmania estimate annual visits could triple or quadruple to over 400,000 within a decade as cheaper, ice-capable ships and new technologies expand access.
Some travelers come specifically for “last-chance” experiences, hoping to see glaciers, penguin colonies and other features before they are altered by climate change. The Antarctic Peninsula—one of the fastest-warming places on Earth—has seen dramatic ice loss: NASA estimates an average melt of about 149 billion metric tons of Antarctic ice per year from 2002 to 2020.
The recent outbreak of a rare hantavirus on a Dutch expedition ship, the MV Hondius, has focused attention on the public-health risks linked to polar tourism. According to the World Health Organization, the Hondius departed Ushuaia, Argentina, on April 1 and visited Antarctica and several remote islands. WHO officials say they are investigating possible person-to-person spread but currently suspect the index case likely contracted the virus before boarding; investigators have reported there are no rats on the vessel. Hantaviruses typically spread when people inhale air contaminated by infected rodent droppings.
Outbreaks of more familiar illnesses have also illustrated how quickly disease can travel on cruise ships. Norovirus has repeatedly sickened passengers in close quarters, and the 2020 COVID-19 outbreak aboard the Diamond Princess showed how a ship can become an incubator for a fast-moving virus.
Beyond viruses, the introduction of invasive species and microscopic organisms is a major conservation concern. Migratory birds have already brought avian influenza from South America into Antarctic regions in recent years, according to the U.S. Centers for Disease Control and Prevention. To limit risks, tour operators and researchers follow strict biosecurity practices: visitors must avoid contact with wildlife, keep gear off the ground, and submit to cleaning routines that include vacuuming, disinfecting and brushing boots and equipment to remove seeds, feathers, soil and tiny hitchhikers.
“The wildlife and ice formations in Antarctica are unlike anywhere else on Earth and they leave a lasting impression,” said Claire Christian, executive director of the Antarctic and Southern Ocean Coalition. She noted that footprints and other traces can persist for decades, and she is urging stronger protections at international treaty meetings to safeguard penguins, seals, whales, seabirds and krill—the latter forming the base of the Antarctic food web.
Antarctic activities are governed under the 1959 Antarctic Treaty, which designates the region as a scientific preserve for peaceful purposes and establishes principles intended to minimize environmental impact. Operators and researchers typically follow voluntary biosecurity guidelines and submit environmental impact assessments for planned visits, but treaty-era rules were written when tourism was far smaller in scale, making some experts call for more robust regulation.
Hanne Nielsen, a senior lecturer in Antarctic law at the University of Tasmania and a former expedition guide, described the heavy emphasis on hygiene and equipment cleaning during voyages. She and colleagues warn that as access grows and costs fall, the sheer number of visitors could multiply pressure on the continent’s ecosystems.
For now, the draw of the frozen frontier remains strong: travelers continue to come for the spectacle of icebergs, whale sightings and penguin rookeries. But scientists and conservationists say expanding tourism must be matched by stricter safeguards, improved monitoring, and international cooperation to prevent contamination and protect Antarctica’s unique and vulnerable environments for generations to come.
